I think you should consider what implementing this feature means.

It means creating a protocol, where the recipient is required to send information back, when they perform an action on an e-mail.

This is probably the worst idea I have read on the Features list.

No, no, no -- Just no!

this is important when time is of the essence to have proof of delivery no necessarily a read receipt but the choice of both would be helpful

I would like to receive a read confirmation for Protonmail

Bonjour à tous,

J'ai trouvé comment activer la fonction, c'est expliquer ici:
https://protonmail.com/support/knowledge-base/read-receipts/

C'est une option dans le mail, par contre je n'ai pas trouvé comment l'utiliser automatiquement ...

Passez une bonne journée,

Hello,
Please allow us to automatically ask for a reading confirmation from the recipient when we send e-mails.
It is very important for us to know that the recipients have read our messages.
However, for security reasons, when we are the recipients, we do not want to send automatically to our senders automatic reading confirmations.
Thank you for your assistance.
Regards,

I too require this read receipt for sending only, not receving read receipt by others.

Here it is almost the end of 2018 and you folks at Protonmail are apparently still fence straddling. I too, wish to dump GMAIL, but until Proton adds the READRECEIPT option setting, I cannot. C'mon, folks, business needs it!

This seems counter to the ethos of PM and would be blocked by default in their UI.

I really agree. I was happy to find an alternative to gmail, but this makes it unusable for business purposes

Shouldn't a read receipt ask you if you want to notify the sender? This is the behavior in Thunderbird. So, it should have the same behavior in a web client or app as well. This can be set to auto or manual - "always respond, never respond, always ask, etc." But we as senders should certainly have the ability to attach read receipts to our messages.

RG, Read Receit would be to notify you (the Protonmail sender) that your email to them has been read, not for them to be notified that you read their email. Well... unless they are a Protonmail user, too.

Well you can make that as an option. Also, making this as a setting for individual email address in an account would be better. For example, I would like my friends to know that I have read their emails, that has been to the address *****************. At the same time, I do not want my land lord to that that I have read his/her email that has been sent to *****************.

Tout à fait, moi aussi j'aimerais avoir une telle fonction, surtout que avec protonmail sur environ 10 emails envoyés au moins 2 ce sont perdus, et confirmé par le destinataire. Salutations

I need to know the lawyer I am writing is opening my emails. It is imperative

Bonjour, Je serais aussi fort intéressée par cette fonction accusé de réception. cordialement,

It would be an effective way to minimize resent or appear pestering

Bonjour, y a-t-il une raison technique expliquant l'absence d'une fonction accusé réception ? Je vous remercie par avance de votre réponse.
Hello, is there a technical reason for the absence of an acknowledgment of receipt ? Thank you in advance for your answer.

I would like to see a read receipt option as well. I am an independent contractor for the state of Washington. Some of the folks I email at the state of Washington don't respond back to me unless I request a read receipt--the request for read receipt catches their attention better.

This is a huge limitation. Many other services offer this feature. Shouldn’t the primary concern here be to provide excellent feature for uuur customers, who obviously desire this feature.

Agree with the comments below, the absence of this feature is a real limitation of an otherwise terrific mail service.